docs: def build_special_journals_kb(fpath):
      """Load special journals database from file
  
      Special journals are journals that have a volume which is not unique
      among different years. To keep the volume unique we are adding the year
      before the volume.
      """
      journals = set()
      with file_resolving(fpath) as fh:
          for line in fh:
              # Skip commented lines
              if line.startswith('#'):
                  continue
              # Skip empty line
              if not line.strip():
                  continue
              journals.add(line.strip())
  
      return journals